9/11 families and responders react after viewing the Cuba proceedings via closed-circuit television

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Ken Fairben holds a photo showing his son Keith, left, a victim of the Sept, 11, 2001 attacks, as he holds a press briefing on Monday, Oct. 15, 2012, outside Fort Hamilton Army base in Brooklyn, N.Y.

There are times when Ken Fairben, still mourning the loss of his paramedic son on 9/11, thinks he will never see the end of the complex, drawn-out legal case for the men accused in his death.

But "we're willing to stay the course," Fairben said Monday after watching the start of pretrial hearings for five men charged in the terrorist attacks. "It's important for us to be here to continue his legacy, his memory. We're his voice."

Fairben and his wife, Diane, went from their home in Floral Park, Long Island, to Fort Hamilton, Brooklyn, to bear the torch for Keith, their only child. They were among the 9/11 families and responders viewing the Cuba proceedings via closed-circuit television in New York, New Jersey, Massachusetts and Maryland.

The suspects include the self-professed mastermind of the Sept. 11 attacks.

As he watched, Ken Fairben examined each of the five men's faces, wondering, "What is he thinking? Why would he want to do this?"

"I feel anger. I want to strike out. I want to inflict harm on them," he said.

But he also still has "a lot of faith in the justice system" — especially after attending the trial of Zacarias Moussaoui, who is serving a life sentence without parole.

That's what Fairben favors for the current defendants.

"If you give them death penalties, that's martyrdom to them. Why give them something they want?"

Robert Reeg, 60, a retired firefighter who was critically injured on 9/11, expressed a similar mindset as he came to Brooklyn from suburban from Rockland County.

"It's been a long ordeal," he said.

First, there was a 2009 decision to drop earlier military-commission charges. Congress then blocked civilian trials amid opposition to bringing the defendants to U.S. soil.

"Its' four years of being mentally waterboarded because of that decision," Reeg said. But "we're going to persevere. We want justice."

He described Monday's hearing as "a lot of arguing over legal points."

Among them were arguments from defense lawyers that their clients shouldn't have to attend the hearing. The military judge over the proceedings ruled that the men would not have to attend the hearings at least for the rest of the week.

Compared to last May's hearing, the defendants on Monday were "somewhat more cooperative," Reeg said.

After a few hours of watching the hearing, Fairben walked out of the fort and broke down in tears, remembering the last time he spoke to his son: by phone at 9 a.m. on Sept. 11, 2001.

"And he told me, dad, I'm down here, and I can't talk," said Fairben, his voice breaking.

Months later, when Keith's remains were found, his father, who worked in the funeral business, sent a hearse to Manhattan to pick up the remains.